Have you used page load management through a controller in real projects?

Yes, in real Java projects, managing page loading through a controller is a standard approach in the MVC (Model-View-Controller) architecture. The controller receives an HTTP request, processes the logic, interacts with the model (for example, with a database), and then selects and returns the appropriate view — a page or data.

For example, in Spring MVC, a controller might look like this:

@Controller
public class PageController {

    @GetMapping("/home")
    public String homePage(Model model) {
        model.addAttribute("message", "Welcome!");
        return "home"; // name of the page template
    }
}

Here, the controller handles the request to /home, adds data to the model, and returns the name of the page to display. This approach allows separating the processing logic from the display, simplifying maintenance and development of the application.